diff options
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 4931d3856aa3..91d123938cef 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2517,6 +2517,7 @@ int open_ctree(struct super_block *sb, int num_backups_tried = 0; int backup_index = 0; int max_active; + bool cleaner_mutex_locked = false; tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL); chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL); @@ -2995,6 +2996,13 @@ retry_root_backup: goto fail_sysfs; } + /* + * Hold the cleaner_mutex thread here so that we don't block + * for a long time on btrfs_recover_relocation. cleaner_kthread + * will wait for us to finish mounting the filesystem. + */ + mutex_lock(&fs_info->cleaner_mutex); + cleaner_mutex_locked = true; fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, "btrfs-cleaner"); if (IS_ERR(fs_info->cleaner_kthread)) @@ -3054,10 +3062,8 @@ retry_root_backup: ret = btrfs_cleanup_fs_roots(fs_info); if (ret) goto fail_qgroup; - - mutex_lock(&fs_info->cleaner_mutex); + /* We locked cleaner_mutex before creating cleaner_kthread. */ ret = btrfs_recover_relocation(tree_root); - mutex_unlock(&fs_info->cleaner_mutex); if (ret < 0) { btrfs_warn(fs_info, "failed to recover relocation: %d", ret); @@ -3065,6 +3071,8 @@ retry_root_backup: goto fail_qgroup; } } + mutex_unlock(&fs_info->cleaner_mutex); + cleaner_mutex_locked = false; location.objectid = BTRFS_FS_TREE_OBJECTID; location.type = BTRFS_ROOT_ITEM_KEY; @@ -3178,6 +3186,10 @@ fail_cleaner: filemap_write_and_wait(fs_info->btree_inode->i_mapping); fail_sysfs: + if (cleaner_mutex_locked) { + mutex_unlock(&fs_info->cleaner_mutex); + cleaner_mutex_locked = false; + } btrfs_sysfs_remove_mounted(fs_info); fail_fsdev_sysfs: |